Bad Born Blood is a Manga/Manhwa/Manhua in english language, Action series, english chapters have been translated and you can read them here. You are reading chapters on www.mgeko.cc fastest updating comic site. The Summary is

[By the Studio that brought you and and ]

Humanity's home is no longer Earth. Intersellar travel is now a common occurence, and technology has replaced blood and flesh. Luka, who grew up in the slums, has turned fifteen and taken the selection exams. His aptitude is of the "Imperial Guard."